Trusted Reviews is supported by its audience. If you purchase through links on our site, we may earn a commission. Learn more. Wireless Ground All kinds of mobile phone accessories, from chargers to headsets to cases. Wireless Ground Sound Amplifier Review Score The Sound Amplifier from Wireless Ground is a small and easily portable piece of kit that lets you play music from your iPhone 4/4S more loudly Wireless Ground Amy Jones Page 1 of 1